![Maxime Ripard](/assets/img/avatar_default.png)
Now that we have the guarantee that we will have only a single YUV plane, actually support them. The way it works is not really straightforward, since we first need to enable the YUV mode in the plane that we want to setup, and then we have a few registers to setup the YUV buffer and parameters. We also need to setup the color correction to actually have something displayed. Reviewed-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com> Link: https://patchwork.freedesktop.org/patch/msgid/66088c1398bd3189123f28a89a7ccc669fe9f296.1519931807.git-series.maxime.ripard@bootlin.com
206 lines
5.8 KiB
C
206 lines
5.8 KiB
C
/*
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* Copyright (C) 2015 Free Electrons
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* Copyright (C) 2015 NextThing Co
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*
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* Maxime Ripard <maxime.ripard@free-electrons.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*/
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_plane_helper.h>
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#include <drm/drmP.h>
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#include "sun4i_backend.h"
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#include "sun4i_frontend.h"
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#include "sun4i_layer.h"
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#include "sunxi_engine.h"
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static void sun4i_backend_layer_reset(struct drm_plane *plane)
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{
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struct sun4i_layer *layer = plane_to_sun4i_layer(plane);
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struct sun4i_layer_state *state;
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if (plane->state) {
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state = state_to_sun4i_layer_state(plane->state);
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__drm_atomic_helper_plane_destroy_state(&state->state);
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kfree(state);
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plane->state = NULL;
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}
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state = kzalloc(sizeof(*state), GFP_KERNEL);
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if (state) {
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plane->state = &state->state;
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plane->state->plane = plane;
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plane->state->zpos = layer->id;
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}
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}
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static struct drm_plane_state *
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sun4i_backend_layer_duplicate_state(struct drm_plane *plane)
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{
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struct sun4i_layer_state *orig = state_to_sun4i_layer_state(plane->state);
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struct sun4i_layer_state *copy;
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copy = kzalloc(sizeof(*copy), GFP_KERNEL);
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if (!copy)
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return NULL;
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__drm_atomic_helper_plane_duplicate_state(plane, ©->state);
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copy->uses_frontend = orig->uses_frontend;
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return ©->state;
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}
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static void sun4i_backend_layer_destroy_state(struct drm_plane *plane,
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struct drm_plane_state *state)
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{
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struct sun4i_layer_state *s_state = state_to_sun4i_layer_state(state);
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__drm_atomic_helper_plane_destroy_state(state);
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kfree(s_state);
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}
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static void sun4i_backend_layer_atomic_disable(struct drm_plane *plane,
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struct drm_plane_state *old_state)
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{
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struct sun4i_layer_state *layer_state = state_to_sun4i_layer_state(old_state);
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struct sun4i_layer *layer = plane_to_sun4i_layer(plane);
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struct sun4i_backend *backend = layer->backend;
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sun4i_backend_layer_enable(backend, layer->id, false);
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if (layer_state->uses_frontend) {
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unsigned long flags;
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spin_lock_irqsave(&backend->frontend_lock, flags);
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backend->frontend_teardown = true;
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spin_unlock_irqrestore(&backend->frontend_lock, flags);
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}
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}
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static void sun4i_backend_layer_atomic_update(struct drm_plane *plane,
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struct drm_plane_state *old_state)
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{
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struct sun4i_layer_state *layer_state = state_to_sun4i_layer_state(plane->state);
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struct sun4i_layer *layer = plane_to_sun4i_layer(plane);
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struct sun4i_backend *backend = layer->backend;
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struct sun4i_frontend *frontend = backend->frontend;
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if (layer_state->uses_frontend) {
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sun4i_frontend_init(frontend);
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sun4i_frontend_update_coord(frontend, plane);
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sun4i_frontend_update_buffer(frontend, plane);
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sun4i_frontend_update_formats(frontend, plane,
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DRM_FORMAT_ARGB8888);
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sun4i_backend_update_layer_frontend(backend, layer->id,
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DRM_FORMAT_ARGB8888);
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sun4i_frontend_enable(frontend);
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} else {
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sun4i_backend_update_layer_formats(backend, layer->id, plane);
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sun4i_backend_update_layer_buffer(backend, layer->id, plane);
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}
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sun4i_backend_update_layer_coord(backend, layer->id, plane);
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sun4i_backend_update_layer_zpos(backend, layer->id, plane);
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sun4i_backend_layer_enable(backend, layer->id, true);
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}
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static const struct drm_plane_helper_funcs sun4i_backend_layer_helper_funcs = {
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.atomic_disable = sun4i_backend_layer_atomic_disable,
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.atomic_update = sun4i_backend_layer_atomic_update,
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};
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static const struct drm_plane_funcs sun4i_backend_layer_funcs = {
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.atomic_destroy_state = sun4i_backend_layer_destroy_state,
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.atomic_duplicate_state = sun4i_backend_layer_duplicate_state,
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.destroy = drm_plane_cleanup,
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.disable_plane = drm_atomic_helper_disable_plane,
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.reset = sun4i_backend_layer_reset,
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.update_plane = drm_atomic_helper_update_plane,
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};
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static const uint32_t sun4i_backend_layer_formats[] = {
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DRM_FORMAT_ARGB8888,
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DRM_FORMAT_ARGB4444,
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DRM_FORMAT_ARGB1555,
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DRM_FORMAT_RGBA5551,
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DRM_FORMAT_RGBA4444,
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DRM_FORMAT_RGB888,
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DRM_FORMAT_RGB565,
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DRM_FORMAT_UYVY,
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DRM_FORMAT_VYUY,
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DRM_FORMAT_XRGB8888,
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DRM_FORMAT_YUYV,
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DRM_FORMAT_YVYU,
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};
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static struct sun4i_layer *sun4i_layer_init_one(struct drm_device *drm,
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struct sun4i_backend *backend,
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enum drm_plane_type type)
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{
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struct sun4i_layer *layer;
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int ret;
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layer = devm_kzalloc(drm->dev, sizeof(*layer), GFP_KERNEL);
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if (!layer)
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return ERR_PTR(-ENOMEM);
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/* possible crtcs are set later */
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ret = drm_universal_plane_init(drm, &layer->plane, 0,
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&sun4i_backend_layer_funcs,
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sun4i_backend_layer_formats,
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ARRAY_SIZE(sun4i_backend_layer_formats),
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NULL, type, NULL);
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if (ret) {
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dev_err(drm->dev, "Couldn't initialize layer\n");
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return ERR_PTR(ret);
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}
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drm_plane_helper_add(&layer->plane,
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&sun4i_backend_layer_helper_funcs);
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layer->backend = backend;
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drm_plane_create_zpos_property(&layer->plane, 0, 0,
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SUN4I_BACKEND_NUM_LAYERS - 1);
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return layer;
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}
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struct drm_plane **sun4i_layers_init(struct drm_device *drm,
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struct sunxi_engine *engine)
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{
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struct drm_plane **planes;
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struct sun4i_backend *backend = engine_to_sun4i_backend(engine);
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int i;
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/* We need to have a sentinel at the need, hence the overallocation */
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planes = devm_kcalloc(drm->dev, SUN4I_BACKEND_NUM_LAYERS + 1,
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sizeof(*planes), GFP_KERNEL);
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if (!planes)
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return ERR_PTR(-ENOMEM);
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for (i = 0; i < SUN4I_BACKEND_NUM_LAYERS; i++) {
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enum drm_plane_type type = i ? DRM_PLANE_TYPE_OVERLAY : DRM_PLANE_TYPE_PRIMARY;
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struct sun4i_layer *layer;
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layer = sun4i_layer_init_one(drm, backend, type);
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if (IS_ERR(layer)) {
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dev_err(drm->dev, "Couldn't initialize %s plane\n",
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i ? "overlay" : "primary");
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return ERR_CAST(layer);
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};
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layer->id = i;
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planes[i] = &layer->plane;
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};
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return planes;
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}
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